Manufacturers must verify their equipment's resilience through rigorous testing protocols to receive certification. Testing typically involves:
The Defense Logistics Agency (DLA) maintains the official Acquisition Streamlining and Standardization Information System (ASSIST).
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If you are tasked with validating equipment against MIL-STD-167-2A, follow these engineering best practices:
This regulates the side-to-side vibration of the propulsion shafting. Importance of MIL-STD-167-2A Compliance mil-std-167-2a pdf
Note: Always ensure you are working with the latest "Notice" (e.g., Notice 1) which indicates the standard has been reviewed and deemed valid for use in acquisition. Importance of Compliance
The MIL-STD-167 series is divided into parts to address different types of environmental and internally generated vibrations:
MIL-STD-167-2A defines three specific types of vibration (often referred to as Types III, IV, and V) that are distinct from the general environmental vibrations in Part 1:
While covers environmental and internally excited vibrations for general shipboard equipment (such as electronics, pumps, and structural components), 167-2A specifically targets the unique vibrational profiles of reciprocating components. This includes: Internal combustion engines (diesel engines) Reciprocating air compressors Piston-driven pumps Associated shafting and auxiliary drive systems This link or copies made by others cannot be deleted
: Torsional vibration from reciprocating machinery and propulsion systems. : Longitudinal vibration in propulsion systems. : Lateral vibration in propulsion systems.
, officially titled "Vibration, Mechanical (Shipboard Equipment)," is a United States military standard that establishes the vibration testing requirements for equipment installed aboard naval surface ships and submarines. It is the second revision of the original MIL-STD-167, specifically focusing on the environmental vibration durability of shipboard machinery, components, and systems.
and other DoD agencies for the acquisition and testing of mission-critical shipboard hardware. Testing Types:
The U.S. Department of Defense’s ASSIST (Acquisition Streamlining and Standardization Information System) website is the official repository. A direct search for "MIL-STD-167-2A" will yield a downloadable PDF free of charge, but note that access may require a CAC card or registration for contractors. Try again later
MIL-STD-167-2A applies to all shipboard machinery, including propulsion systems, generators, pumps, and other equipment. The standard covers both new ship designs and existing vessels undergoing refit or upgrade. It is applicable to all U.S. Navy and Marine Corps ships, as well as other naval vessels.
Because this is a Department of Defense (DoD) standard with controlled distribution, it is not always hosted on public-facing commercial sites. You can verify its status or request access via official military document repositories:
: Because it relates to sensitive propulsion technology, some versions of this document are marked for Controlled Distribution and are not available for public download on open repositories.